Transcript Workshop report WG3

ATMOSPHERIC CHEMISTRY
APPLICATIONS WORKSHOP
20-21 January 2004, ESTEC
Albert P H Goede
Objective of the Workshop
User Consultation on present and future
needs for atmosphere chemistry
observations
 Definition of Integrated Global Observation
System, notably the satellite component
Atmospheric Chemistry Applications
Climate
Change
Chemistry-climate
interactions, UTLS,
atmospheric composition & trends,
IPCC assessments
Montreal and Kyoto Protocol Monitoring and Verification
stratospheric ozone, surface UV,
GHG emissions, Policy
support
Troposphere
Cleansing power of
atmosphere/trend
Chemistry free troposphere
Air Pollution
CLRTAP (Convention Long-Range
Transport), EC directives on
air quality,
Policy support
Forecasts
ozone layer and surface UV
chemical weather, improvement of
NWP
User input required on all 5 issues
listed





User Needs and requirements (example, long
term record total ozone, regional forecast air
pollution etc, specify region/spatial
resolution/temporal resolution/ averages, list of
data products.)
User Segment (example, regional
environmental agency, weather service, climate
change agency etc)
Policy foundation (example, Kyoto, CLRTAP
etc)
Science review (what are the underlying
science issues, what do we know, what is still
uncertain, )
Strategy for Integrated Observation System
(What infra structure is there on ground, in
Working Group Composition





WG 1Air Quality Monitoring (chair Boucher/rapporteur
Monks)
ETCACC RIVM+NILU, ADEME, ITC, EMPA, EPA,
GMESDaedalus, CERMES
WG 2 Montreal, Kyoto Protocol Monitoring (ch Barrie, rap
Raes)
WMO, NILU, GMES-GATO, JRC-IES, RIVM-UV
WG 3 Climate Chemistry (chair van Weele, rapporteur
Kerridge)
DLR-IAP, KNMI, JRC, KfA Julich, SPARC, research
groups
WG 4 Tropospheric Chemistry (chair Bovensmann, rap
Krol)
MPI-Hamburg, U Heidelberg, IGBP-IGAC, ACCENT,
LISA,
other research groups
WG 5 Forecasting (chair Peuch, rapporteur Fishman)
User Segment


Scientific users in research institutes inc. met
centres
Expert groups (eg IPCC, WNO-UNEP)who advise
policy makers
User Need







Radiatively active constituents (mediate climate-composition
interaction) nb H2O,O3,aerosol, cirrus (CH4)

Spatially-variable ones from space
Those which interact through chemistry (eg CO, HNO3, NOx)
T + other associated dynamical (incl tracers) and physical
variables (met)
Geographical domain: global
Height domain: troposphere +(part of) stratosphere
Time domain: decadal
Sampling/resolution

Vertical: generally 2km or better (especially in trop)

Horizontal: ~10(’s) km2 (controlled by cloud in lower trop)

Daily (at least)
Precision/accuracy: typically ~10%


Sampling/res requirements lower in stratosphere
Policy foundation


IPCC,WMO,GMES
Indirect: Montreal, Kyoto
Science review
Firm scientific foundation from a number of earlier
international studies(eg Explorer)and parallel (eg
IGACO)reports, and as outlined in Workshop
presentations.
->Interactions between atmospheric composition and
climate are not well understood
-> Strong rationale to make global observations of
key constituents and physical (met)variables on a
long-term basis
Strategy


Exploit available observations and associated infrastructure
(eg for assimilation in climate centres)

Ground-based networks

Current space (eg ERS-2, Envisat, Odin, Aura)

Planned operational space (MetOp, NPOESS)

Models
Complement (perspective, wavelength?) and extend (for
continuity) eg through:

New research missions (eg STEAM, GLORIA, Explorer?)

New operational missions(parallel or beyond
MetOp/NPOESS)

Model development

International co-operation